export function shuffleArray(array : any[]) {
    for (var i = array.length - 1; i > 0; i--) {
        var j = Math.floor(Math.random() * (i + 1));
        var temp = array[i];
        array[i] = array[j];
        array[j] = temp;
    }
}

/**
 *  Sorts all arrays together with the first. Pass either a list of arrays, or a map. Any key is accepted.
 *     Array|Object arrays               [sortableArray, ...otherArrays]; {sortableArray: [], secondaryArray: [], ...}
 *     Function comparator(?,?) -> int   optional compareFunction, compatible with Array.sort(compareFunction)
 */
export function sortArrays(arrays : any[][], comparator = (a:any, b:any) => (a < b) ? 1 : (a > b) ? -1 : 0) {
    let arrayKeys = Object.keys(arrays);
    let sortableArray : (typeof arrays[0][0]) = Object.values(arrays)[0];
    let indexes = Object.keys(sortableArray);
    let sortedIndexes = indexes.sort((a, b) => comparator(sortableArray[a], sortableArray[b]));

    let sortByIndexes = (array : any[], sortedIndexes : number[]) => sortedIndexes.map(sortedIndex => array[sortedIndex]);

    return arrayKeys.map(arrayIndex => sortByIndexes(arrays[arrayIndex], sortedIndexes));
}